25 Best Twitter Moments of 2013

Things got ugly between these two after pop star Katy Perry tweeted her displeasure with Chief Keef’s "I Hate Being Sober" track. When the "I Don’t Like" rapper threatened to lay hands, promised to deliver a diss song, and made a sexually suggestive comment, Perry took the high road and apologized for upsetting the young buck. The result: a mush moment for the young Chicagoan, who ended things with a peace sign and a thumbs up. #collabcomingsoon?